156 SCIENCE BULLETIN, No. 18. 



Genus XLVI. Cysiococcus, Puller. 



Journal W. Australian Bureau, Agriculture, vol. iv, p. 1346, 1897. 

 Trans. Eni. Soc. London, p. 462, 1899. 



Fuller defined this genus as follows, in a description of the type : " C- 

 acJiiniformis— Adult female yellow cyst-like ; legs and antennae absent, 

 ra-juth present, abdomen tapering, ending in a hard black button. There 

 are four black secreting orifices from which filaments protruded near the 

 apex. Gall spherical, orifice at apex, diameter three-quarters to one and a 

 quT-rter inch; walls thin and granulated." 



I leave this unique species in the sub-family Brachyscelinae, on account of 

 the typical gall and general structure of the female coccid, considering the 

 thimble-shaped anal extremity as analogous with the more distinct tails of 

 Apiomorpha and Ascelis. 



Cystococcus pomiformis, Froggatt (Fig. 109). 

 pomiformis. Pro. Linn. Soc. N.S.W., vol. vii, p. 367, pi. vii, f. 7, 1892. 

 Cystococcus echinoformis. Fuller, Journ. W. Aust. Bureau Agri., vol. iv, p. 1346, 1897. 

 Trans. Ent. Soc. London, p. 462, pi. xv, 1899. 

 Ascelis echinoformis, Cockerell, Canadian Eniomologist, vol. xxxi, p. 276, 1899. 



This remarkable gall is recorded from north-west Australia (King's Sound) 

 on Eucalyptus tesselatus, Torrens Creek, North Queensland, and Tennant's 

 Creek, Central Australia, upon undetermined species of eucalpyts. 



Galls apple-shaped, sessile on slender twigs, up to two and a half inches in 

 diameter, and one and a half inches in height, with a deep depression on the 

 summit, in the centre of which is the circular apical orifice. General colour 

 greyish brown, the outer surface often roughened or granulated ; the walls 

 of the gall about a quarter of an inch in thickness, so that the gall chamber 

 is very large, inner surface with a smooth hard shell, with an inverted funnel- 

 like process at the apex of the chamber below the apical orifice. 



Adult female dull yellow, with the cephalic portion and abdomen spotted 

 and mottled with reddish brown ; the anal extremity smooth, shining black, 

 rounded at the tip. The female occupies the centre of the gall chamber, 

 with the apex of the cephalic portion striated, and attached to the bottom 

 of the gall, with the tip of the abdomen fitting into the funnel-shaped structure 

 at the summit of the chamber. The thoracic segments deeply corrugated, 

 showing black spots indicative of the larval legs ; the abdominal segments 



